Pushbutton radio

ABSTRACT

A pushbutton radio capable of receiving AM and FM broadcast stations which includes one set of pushbuttons each of which operates to position first and second tuning elements to tune the radio to preset AM and FM broadcast stations without resetting the key slides. Each of the pushbuttons is connected to a button slide which is slidably mounted in a button guide. A cam connected to the button guide is operated between first and second positions to raise and lower the button guide thereby connecting the button slide to first and second key slides depending on whether the AM or FM mode of operation is selected.

United States Patent Inventors Charles E. Lyon Des Plaines; John S..larecki, Chicago, 1". Appl. No. 551,036 Filed May 18, 1966 PatentedJune 8, 1971 Assignee Motorola, Inc.

Franklin Park, Ill.

PUSHBUTTON RADIO 9 Claims, 13 Drawing Figs.

F16h 35/18 Field of Search 74/10.33, 10.31, 10.29, 10.27, 10.37, 10.35;334/7 References Cited UNITED STATES PATENTS Primary ExaminerMiltonKaufmann Att0rneyMueller & Aichele ABSTRACT: A pushbutton radio capableof receiving AM and FM broadcast stations which includes one set ofpushbuttons each of which operates to position first and second tuningelements to tune the radio to preset AM and FM broadcast stationswithout resetting the key slides. Each of the pushbuttons is connectedto a button slide which is slidably mounted in a button guide. A camconnected to the button guide is operated between first and secondpositions to raise and lower the button guide thereby connecting thebutton slide to first and second key slides depending on whether the AMor FM mode of operation is selected.

PATENTEDJUH 8197! 3.583.241

' sum 1 ur 4 i d v INVENTORS CHARLES E. LYON JOHN $.JARECKI 19 I21" l3ATTORNEYS PATENTEU Jun 8 |97| SHEET 2 OF 4 FIGS 5 INVENTQRS CHARLES E.LYQN JOHN S. JARECKI BY M i M ATTORNEYS PATENTED JUN 8 |97| 1 sum u or 4mkwm mhI m OE mQE

INVENTORS CHARLES E. LYON JOHN S. JARECKI ATTORNEYS PUSIIBUTTON RADIOThis invention relates to pushbutton operable devices, and moreparticularly to a pushbutton operable tuner for a radio receiver adaptedto receive different frequency bands.

In the past, most radios, having the capability of pushbutton operationfor both AM (amplitude modulation) and FM (frequency modulation)reception, have had some undesirable limitations. For example, theselection of stations was limited, because the setting of thepushbuttons had to be divided between the AM and FM broadcast stationsso that for a five button radio, three buttons, for instance, might beset to AM stations and only two buttons to FM stations.

It is an object of this invention to provide an improved pushbuttonoperable tuner for a radio receiver adapted to receive differentfrequency bands.

It is another object of this invention to provide a pushbutton radiothat has one set of pushbuttons where each button operates to positionfirst and second tuning elements to tune the radio to preset stationsbroadcasting on different frequency bands.

A feature of this invention is a pushbutton radio capable of receivingfirst and second frequency bands and including one set of pushbuttonseach of which operate to position first and second tuning elements totune the radio to preset stations broadcasting on the differentfrequency bands, wherein a pushbutton is connected to a sliding memberwhich is coupled by a mode selector to either a first or secondactuating member. The actuating members are coupled to the first andsecond tuning elements so that pushing the pushbutton moves the slidingmember to operate the particular actuating member to which it has beencoupled by the mode selector thereby positioning the tuner coupledthereto to a preset station.

Another feature of this invention is a pushbutton radio capable ofreceiving AM and FM broadcast stations and including one set ofpushbuttons each of which operate to position first and second elementsto tune the radio to preset AM and FM broadcast stations, having aselector switch actuable to electrically switch the radio between FM andAM modes, a button slide connected to the pushbutton and having aconnector extending therefrom and being slidably mounted in a buttonguide, and a cam connected to the button guide that moves the buttonguide between first and second positions and actuates the selectorswitch to electrically switch the radio between AM and FM modescorresponding to the first and second positions of the button guide.First and second plunger rods are coupled to the AM and FM tuningelements and each include a channel which slidably receives theconnector of the button slide and a notch normal to the channel, so thatoperating the cam to position the button guide to the first positionengages the connector of the button slide with the notch in the plungerrod associated with the first position, and operation of the pushbuttoncauses the engaged plunger rod to move with the connector sliding in thechannel of the unengaged plunger rod to position the tuning elementcoupled to the engaged plunger rod to a preset station.

Another feature of this invention is an AM-FM pushbutton radio havingtuning means including AM and FM tuning elements and a key slidestructure carrying a presettable cam thereon for controlling theposition of the tuning elements wherein the first and second plungerrods each have first and second relatively movable parts with thepresettable cam clamped in a fixed position therebetween so that withthe button guide being moved by the cam to the first position, pullingthe pushbutton will engage the connector in the notch in the plunger rodcorresponding to the first position of the button guide and will movethe movable parts of that plunger rod relative to each other to unlockthe presettable cam with the connector sliding in the channel of theother plunger rod, thereby permitting the presettable cam to beadjustable and locked in a plurality of positions for controlling theposition of the tuning elements.

A further feature of this invention is an AM-FM pushbutton radio havingtuning means including AM and FM tuning elements and a key slidestructure carrying a presettable cam thereon for controlling theposition of the tuning elements, having a locking device to limit theinward movement of the pushbutton to prcventjamming of the tuning meansif the cam is operated to move the button guide to the second positionwith the pushbutton pulled to unlock the presettable cam on the plungerrod associated with the button guide being positioned in the firstposition.

Another feature of this invention is a pushbutton radio capable ofreceiving AM and FM broadcast stations and including one set ofpushbuttons, each of which operate to position first and second tuningelements to tune the radio to preset AM and FM broadcast stations,having a pushbutton with an extended hollow portion forming a buttonslide, oppositely disposed connecting members mounted within the hollowportion, and first and second plunger rods extending into the hollowportion and each having a notch which is selectively engaged by one ofthe oppositely disposed connectors upon moving the button guide betweenthe first and second positions with the cam, so that pushing the buttonwill move the engaged plunger rod to vary the position of the tuningelement associated with that plunger rod. In the drawings:

Flg. l is a front elevation view of the pushbutton radio in accordancewith this invention;

Flg. 2 is a front elevation view of the pushbutton radio similar to FIG.1;

FIG. 3 is a bottom plan view of the pushbutton radio of FIG.

FIG. 4 is a side elevation view of the pushbutton radio of FIG. 1including a schematic block diagram illustrating the operation of thepushbutton apparatus;

FIG. 5 is a top plan view ofa part of the device of FIG. 1;

FIG. 6 is a side elevation view of that part of the device of FIG. 1shown in FIG, 5;

FIGS. 7a7d are side elevation views of that part of the device of FIG. Ishown in Flg. 5 illustrating operation of the part; and

FIG. 8 is a bottom plan view of a second embodiment of the part of thedevice of FIG. I as shown in FIG. 5;

FIG. 9 is a side elevation view of the device shown in FIG. 8; and

FIG. 10 is a front elevation view of a portion of the device shown inFIG. 8.

In one embodiment of this invention, a pushbutton radio is capable ofreceiving AM andF M broadcast stations and has one set of pushbuttonseach of which operate to position first and second tuning elements totune the radio to preset AM and FM broadcasting stations. Each of thepushbuttons is connected to a button slide that is slidably mounted in abutton guide which is movable between first and second positions. Firstand second plunger rods are selectively connected to the button slide bya cam which positions the button guide between the first and secondpositions to move the button slide into engagement with the selectedplunger rod. The first and second plunger rods each have a presettablebutton guide that is locked between two relatively movable portionsthereof and which engages a treadle mechanism to position the tuningelements to the preset station. Movement of the treadle mechanism drivesboth tuning elements but a selector switch that is responsive tomovement of the cam electrically switches the radio between AM and FMoperation so that one of the tuners is rendered inoperative at alltimes. When changing the preset AM station, for instance, the operatormoves the cam to position the button guide to engage the button slidewith the plunger rod which is coupled to the AM tuning element. Theoperator then pulls the pushbutton which moves the two portions of theengaged plunger rod relative to one another to unlock the presettablecam so that it may be repositioned. An interlock device limits inwardmotion of the pushbutton should the operator inadvertently operate thecam to move the button guide to the FM position with the pushbuttonpulled consequential to changing the presettable cam position on the AMplunger rod.

In a second embodiment of the invention, each of the pushbuttons has anextended hollow portion which forms a button slide, which is slidablymounted in a button guide similar to that described in the firstembodiment. First and second plunger rods coupled to AM and FM tuningelements respectively extend into the hollow portion. Movement of thecam moves the button guide between first and second positions so thatthe plunger rods are selectively engaged by connectors oppositelydisposed within the hollow portion. Operation of the pushbutton movesthe button slide and engaged plunger rod to position the tuning elementsassociated therewith to a predetermined broadcast station.

Referring to the figures of the drawing, FIGS. l4 illustrate the generalconstruction of a pushbutton radio capable of receiving AM and FMbroadcast stations. The radio has one set of pushbuttons 12 each ofwhich operate to position AM 14 and FM 16 tuning elements (FIG. 4) totune the radio to preset AM and FM broadcasting stations.

The radio 10 is comprised of an escutcheon 18 having a manual tuningknob 19 and a volume control knob 20 mounted thereto. A button guideassembly 22 is movably mounted to the escutcheon 18 by a frame 24 (FIG.37. The button guide 22 is moveably secured to the frame 24 by the bentfingers 26. There is a clearance between the button guide assembly 22and the frame 24 so that the button slide assembly can be moved in anupward and downward direction within the frame. A cam comprising anelongated thin strip of sheet material 31 is slidably clamped to the topof the frame 24 by clamp 32. Bent portions 34 and 35 of the cam 30 formthe cam surfaces, and the archlike projections 37, 38 and 39 and 40,that are integral with the button guide 22, form the cam followersurfaces.

In FIG. I the cam 30 is moved from right to left so that the bentportions 34 and 35 of the cam 30 ride over arch-shaped portions 37 and39 of the button guide 22 to move the button guide to the lower positionin the frame 24. In FIG. 2 the cam 30 is moved from left to right sothat the bent portions 34 and 35 ride under the arch-shaped portions 38and 40 to move the button guide 22 to the upper position in the frame24. With the button guide in the lower position as shown in FIG. I, theradio is set for AM operation, and with the button guide in the raisedposition as shown in FIG. 2, the radio is set for FM operation.

The pushbuttons 12 are slidably supported within the but- 7 ton guide 22and move between the upper and lower positions with the button guide.The radio may be tuned either manually with the knob 19 or with thepushbuttons in the manner as described in US. Pat. No. 2,793,531 issuedto R. E. Thompson and assigned to the assignee of the present invention.

The radio has an AM tuner 14 and an FM tuner 16, that is mounted inpiggyback style to the AM tuner 14 as shown in FIG. 4. A treadlemechanism 42 is operated by the manual knob 19 or the pushbuttons l2 andis connected to both the AM and FM tuners so that when the treadlemechanism 42 is moved both tuners are varied simultaneously. Operationof piggyback AM and FM tuners such as this is described in patent No.3,251,012 issued to N. .I. Kazyk et al. and assigned to the assignee ofthe present invention. A mode selector switch 44 (FIG. 4) is actuated bythe cam 30 to electrically energize either the AM tuner 14 or FM tuner16, depending on whether the cam 30 is operated to move the button guide22 to the lower position for AM operation or to the upper position forFM operation.

The key slide structure 45 shown mounted in the radio in FIG. 3 andremoved from the radio in FIGS. 5 and 6 is unique in that it offerspushbutton tuning to a preselected station for both AM and FM tuners foreach pushbutton. Key slide assembly 45 includes a button slide 47 and apair of plunger rods 49 and 50. The button slide is slidably mounted onthe button guide 22, and theplunger rods are mounted adjacent to eachother within the radio, and each has a channel 52 and 53 respectivelythat are inverted with respect to one another. The relative positions ofthe channels may be clearly seen in FIG. 7. Each channel 52 and 53 has anotch 55 and 56 at the end thereof closest to the pushbutton which isnormal to the channel and a notch 58 and 59 that is substantiallyintermediate the ends of the channel and normal thereto. Staked to thebutton slide 47 is a connector or pin 60. With the pushbutton at rest,the intermediate notches 58 and 59 of the channels 52 and 53 are alignedand receive the connector 60 therethrough (FIG. 6), and they form apassage for the connector 60 between the channels.

Referring to FIG. 3, each of the plunger rods 49 and 50 have relativelymovable portions 63 and 64 and presettable cams 66 and 67 each of whichis locked between the two relatively movable portions 63 and 64 in theknown manner. The cams 66 and 67 strike the treadle mechanism 42 whenthe pushbutton is operated, to tune the tuning elements to the presetstation.

The preset station may be changed by manually tuning the radio to thedesired station. The plunger rod 49, for instance, is engaged by theconnector 60 by positioning the button guide 22 with the cam 30 to theupper position. Pulling outwardly on the pushbutton 13 moves the tworelatively movable portions 63 and 64 relative to each other to unlockthe cam 66. The pushbutton 13 is then pushed all the way in and the camstrikes the treadle mechanism 42 and is aligned therewith. At the end ofthe inward motion of the pushbutton 13 the two relatively movable parts63 and 64 are once again moved with respect to each other to lock thecam 66 in a fixed position corresponding to the station to which themanual tuner 19 had positioned the treadle mechanism 42.

In operation, suppose FM reception is desired the operator moves the cam30 from left to right which causes the button guide 22 to be raised tothe upper position in the frame 24. Because the button slide 47 ismounted within the button guide 22, it too is raised moving the pin 60within the passage formed by the aligned notches 58 and 59 until the pin60 is contained within the notch 58 in the plunger rod 49. Pushing thepushbutton 13 moves the button slide 47 and connector 60 into engagementwith the wall of notch 58. Continued movement of the pushbutton, slidesplunger rod 49 forward. The plunger rod 50 does not move becauseconnector 60 is free to move within the channel 52 located in plungerrod 50. Once the proper plunger rod has been selected, the remainder ofthe tuning operation is standard with the presettable cam 66 carried byplunger rod 49 engaging the treadle mechanism 42 to vary the tuningelements to the preset stations. Because the motion of the cam 30 movesthe selector switch 44 to energize the FM tuner 16, the AM tuner 14 isin effect removed from the system. Therefore, although the treadlemechanism 42 is also varying AM tuner 14, it has no effect on the radioreception. If AM reception is desired, the operator simply moves the cam30 from right to left which will lower the button guide 22 so that thepin 60 will engage the notch 59 in plunger rod 50 and will slide inchannel 53 of plunger rod 49 when the pushbutton is pushed. It can beseen, therefore, that one pushbutton may be used to tune the radio toboth preset AM and FM stations by simply operating the cam mechanism 30between the AM and FM positions.

FIGS. 7a7d illustrate a protective illustrate a protective feature thathas been built into the radio to prevent jamming of the tuning mechanismwhen the operator is setting the pushbutton to a different broadcastingstation. For example, in FIG. 7a the cam 30 has been set for FMoperation, therefore the pin 60 is engaged in the notch 58 of plungerrod 49. In order to reset the pushbutton to a different FM station, theoperator pulls the pushbutton outwardly, which causes the pin 60 toengage the wall of notch 58 to move plunger rod 49 outwardly with thepin 60 sliding in channel 52 of plunger rod 50. This moves the twoportions 63 and 64 of the plunger rod 49 relative to each other torelease the cam 66 so that it may be set to the new position of thetreadle mechanism 42. Now if the pushbutton is pushed in all the way,the two portions of the plunger rod 49 will once again be moved relativeto each other to lock the presettable cam 66 into position. However,there is a chance that the operator might move the cam 30 from right toleft thereby lowering the button guide 22 which will lower the buttonslide 47 and the pin 60 connected thereto. With the pushbutton pulledall the way out, however, the notch 58 of plunger rod 49 is aligned withthe notch 55 in the end of the channel 52 (FIG. 7b) so that a passage isformed by the aligned notches. Movement of cam 30 will therefore dropthe pin 60 into channel 53 of plunger rod 49 (FIG. 7c). Should thepushbutton now be pushed inwardly in an attempt to lock the presettablecam in position, the connector 60 will engage the wall of the notch 55in the plunger rod 50 and will attempt to move that plunger rod inwardlytowards the treadle mechanism, however, the pin 60 slides in the channel53 of plunger rod 49 only until the pin 60 strikes the end wall of thatchannel (FIG. 7d). When this occurs, the pushbutton is locked up inposition and can no longer be pushed forward so that there can benojamming of the tuning device.

FIGS. 8l0 illustrate a second embodiment of the invention. In thisembodiment, the pushbutton 70 has an elongated portion 72 that ismounted in the button guide 22 of the first embodiment and functions asa button slide. The button slide 72 is hollow and has two connector pins75 and 76 oppositely disposed at the top and bottom of the button slide.'lwo plunger rods 78 and 79 are mounted in the radio adjacent to eachother and extend into the hollow button slide 72. The plunger rods 78and 79 each have a notch 80 and 8] respectively in the ends thereof.With the plunger rods mounted adjacent to each other, the notch 81 inrod 79 opens downwardly from the bottom edge 86 of the rod 79 while thenotch 80 in rod 78 opens upwardly from the top edge 85 thereof.

In operation, if the cam 30 is moved from right to left, the buttonguide 22 is lowered which engages the notch 80 in plunger rod 78 withconnector pin 76 in the button slide 72. Therefore, when the pushbuttonis operated the pin 76 strikes the wall of the notch 80 and moves theplunger rod 78 forward until the cam 83 strikes the treadle mechanism 42to tune the tuning element 14 to a preset station.

If FM operation is desired the cam 30 is moved to the FM position whichraises the button guide 22 and the button slide 72 so that connector pin75 fits into the notch 81 in plunger rod 79. Operation of the pushbuttonthen acts to move plunger rod 79 until the cam 84 strikes the treadlemechanism 42' to vary the FM tuning element 16 to tune the radio to apreset FM broadcast station.

What has been described, therefore, is an improved pushbutton radio thathas one set of pushbuttons where each button operates to position firstand second tuning elements to tune the radio to preset stationsbroadcasting on different frequency bands.

The positions of the cams 83 and 84 may be changed by engaging the pins75 and 76 in the respective notches 8] and 80 of the plunger rods andpulling on the pushbutton to unlock the cams in a manner similar to thatdescribed for the first embodiment.

We claim:

1. A pushbutton radio for receiving first and second frequency bands andhaving one set of pushbuttons each of which can be operated to positionfirst and second tuning elements to tune the radio to preset broadcaststations in the different bands, said radio including in combination, aselector switch actuable to switch the radio between the first andsecond frequency bands, cam means, a button guide connected to said cammeans, said cam means being operated to move said button guide to firstand second positions, a button slide connected to the pushbutton, firstand second plunger rods coupled to the first and second tuning elements,presettable cam means mounted to said first and second plunger rods,means integral with said first and second plunger rods for locking saidpresettable cam means in a selected position and unlocking the same,said presettable cam means being selectively coupled to the first andsecond tuning elements, said cam means for coupling said button slide tosaid first and second plunger rods, said cam means in said firstposition with the radio switched to the first frequency band acting tocouple said button slide to said first plunger rod so that pushing thepushbutton slides said button slide to move said first plunger rod andsaid presettable cam means thereon to position the first tuning elementto tune the radio to a preset broadcast station of the first frequencyband, said cam means in said second position with the radio switched tothe second frequency band acting to couple said button slide to saidsecond plunger rod, so that operation of the pushbutton slides saidbutton slide to move said second plunger rod and said presettable cammeans thereon to position the second tuning element to tune the radio toa preset broadcast station in the second frequency band, and pullingsaid pushbutton with said cam means in said first and second positionsoperates said means integral with each said plunger rod to unlock saidpresettable cam means to permit moving the same to a different position,and pushing the pushbutton operates said means integral with each saidplunger rod to lock said presettable cam means in the differentposition.

2. The pushbutton radio of claim 1 wherein said button slide includesengaging means connected thereto, and said first and second plunger rodshave channel means for slidably receiving said engaging means andpassage means including a notch in each of said plunger rods normal tosaid channel therein, said notches being aligned to form a passageconnecting said channels, said engaging means selectively extendingthrough said notch in each of said plunger rods, said cam means actingto position said button guide to the first position and switching theradio to the first frequency band so that said engaging means isreceived in said channel means of said second plunger rod wherebyoperation of the pushbutton slides said button slide in said buttonguide with said engaging means sliding in said channel means of saidsecond rod and engaging the wall of the notch in said first plunger rodto move said first rod to vary said first tuning element to tune theradio to a preset station in the first frequency band, and said cammeans acting to position said button guide to the second position andswitching the radio to the second frequency band, so that said engagingmeans moves in said passage means with said notches being aligned andbeing received in said channel means of said first plunger rod, wherebyoperation of the pushbutton slides said button slide in said buttonguide with said engaging means sliding in said channel means of saidfirst rod and engaging the wall of said notch in said second plunger rodto move the same to vary said second tuning element to tune the radio toa preset station in the second frequency band.

3. The pushbutton radio of claim 1 wherein said button slide is formedby an extended hollow portion of the pushbutton, said button slidehaving an open end and contact means connected thereto, and said firstand second plunger rods are coupled to the first and second tuningelements and extend into said hollow portion of said button slidethrough said open end,

each said plunger rod having a portion being selectively con--- nectedto said contact means.

4. The pushbutton radio of claim 3 wherein said contact means includesfirst and second oppositely disposed connecting members mounted to saidextended hollow portion of said button slide and said portions of saidfirst and second plunger rods each have a notch therein, said cam meansacting to position said button guide to the first position so that saidfirst connecting member engages said notch in said first plunger rodwhereby pushing the pushbutton slides said button slide with saidconnecting member engaging the wall of said notch to move said firstplunger rod to vary the first tuning element, and said cam meanspositioning said button guide to the second position so that said secondconnecting member engages said notch in said second plunger rod wherebypushing the pushbutton slides said button slide with said connectingmember engaging the wall of said notch to move said second plunger rodto vary the second tuning element.

5. An AM-FM pushbutton radio having tuning means including AM and FMtuning elements and a key slide structure carrying a presettable camthereon for controlling the position of the tuning elements, the radioincluding in combination, a pushbutton, a selector switch actuable toswitch the radio between FM and AM modes, cam means, a button guide,said cam means being connected to said button guide and being operatedto move the same to first and second positions, a button slide connectedto said pushbutton and slidably mounted in said button guide and movabletherewith, a connector extending from said button slide, first andsecond plunger rods coupled to the FM and AM tuning elements, said firstand second plunger rods each having channel means for slidably receivingsaid connector and passage means including a notch in each of saidplunger rods normal to said channel therein and being aligned to form apassage connecting said channels, said connector selectively extendingthrough said notch in each said plunger rod, said cam means acting toposition said button guide to the first position and said selectorswitch switching the radio to the FM mode, so that said connectorextends through said notch in said first plunger rod and is received insaid channel means of said second plunger rod whereby pushing saidpushbutton slides said button slide in said button guide with saidconnector engaging the wall of said notch in said first plunger rod andsliding in said channel means of said second plunger rod to move thefirst plunger rod to vary the FM tuning element, said cam means actingto position said button guide to the second position and said selectorswitch switching the radio to the AM mode so that said connector movesin said passage means with said notches being aligned and is received insaid channel means of said first said first plunger rod, whereby pushingsaid pushbutton slides said button slide in said button guide with saidconnector engaging the wall of said notch in said second plunger rod andsliding in said channel means of said first plunger rod to move thesecond plunger rod to vary said AM tuning element 6. The AM-FMpushbutton radio of claim further includ ing said first and secondplunger rods each having first and second relatively movable parts witha presettable cam clamped in a fixed position therebetween, said cammeans acting to position said button guide to the first position so thatsaid connector is received in said channel means of said second plungerrod whereby pulling said pushbutton slides said button slide in saidbutton guide and engages said connector with the wall of said notch insaid first plunger rod and slides said connector in said channel meansof said second plunger rod to move the first plunger rod and to movesaid first part thereof relative to said second part to unclamp saidpresettable cam, and said cam means acting to position said button guideto the second position so that said connector is received in saidchannel means of said first plunger rod, whereby pulling said pushbuttonslides said button slide in said button guide to engage the wall of saidnotch in said second plunger rod and slides said connector in saidchannel means in said first plunger rod to move the second plunger rodto move said first part thereof relative to said second part to unclampsaid presettable cam, thereby permitting the presettable cams to belocked in a plurality of positions for controlling the position of theAM and FM tuning elements.

7. The AM-M pushbutton radio of claim 6 further including locking meansto limit the pushing movement of said pushbutton to preventjamming ofthe tuning means with said pushbutton being pulled to unlock saidpresettable cam and said cam means being moved to position said buttonguide from the first to the second positions.

8. The AM-FM pushbutton radio of claim 7 wherein said locking meansincludes a second notch in each of said plunger rods normal to saidchannel means therein and spaced from said first notch, said cam meanspositioning said button guide to the first position so that saidconnector is received in said channel means of said second plunger rod,whereby pulling said pushbutton slides said button slide in said buttonguide with said connectors sliding in said channel means to enga e thewall of said first notch In said first plunger rod to move t e same tounclamp said presettable cam and to align said first notch with saidsecond notch in said second plunger rod to connect the respectivechannel means, and said cam means acting to move said button guide tothe second position so that said connector moves in said aligned notchesinto said channel means of said first plunger rod, whereby pushing saidpushbutton causes said connector to slide in said channel means of saidfirst plunger rod and to strike the wall of said channel means thereinthereby limiting the motion of said first plunger rod to preventjammingof the tuning means.

9. A pushbutton tuner for a wave signal receiver having tuning elementsfor receiving signal stations in first and second frequency bands,including in combination, one set of pushbuttons, a plurality of groupsof first and second actuating devices, each group associated with adifferent one of said pushbuttons, mode selector means for connecting agiven pushbutton with one of said first and second actuating devices,presettable means operable by each actuating device for positioning thetuning elements to preset stations in the different bands, locking meansoperable by each pushbutton through said actuating device for lockingsaid presettable means in a predetermined position and unlocking thesame, said mode selector means connecting a given pushbutton to saidfirst actuating device so that inward movement of said pushbuttonoperates said presettable means through said first actuating device toposition the tuning elements to select a preset station, and outwardmovement of said given pushbutton operates said locking means throughsaid first actuating device to unlock said presettable means so the samecan be reset to a different station, and antijamming means, saidantijamming means acting to prevent said mode selector means fromconnecting any one of said pushbuttons to an associated one of saidgroup of second actuating devices and being moved inwardly to positionthe tuning elements, with said given pushbutton being connected to saidfirst actuating device and being moved outwardly to unlock saidpresettable means to set another station.

1. A pushbutton radio for receiving first and second frequency bands andhaving one set of pushbuttons each of which can be operated to positionfirst and second tuning elements to tune the radio to preset broadcaststations in the different bands, said radio including in combination, aselector switch actuable to switch the radio between the first andsecond frequency bands, cam means, a button guide connected to said cammeans, said cam means being operated to move said button guide to firstand second positions, a button slide connected to the pushbutton, firstand second plunger rods coupled to the first and second tuning elements,presettable cam means mounted to said first and second plunger rods,means integral with said first and second plunger rods for locking saidpresettable cam means in a selected position and unlocking the same,said presettable cam means being selectively coupled to the first andsecond tuning elements, said cam means for coupling said button slide tosaid first and second plunger rods, said cam means in said firstposition with the radio switched to the first frequency band acting tocouple said button slide to said first plunger rod so that pushing thepushbutton slides said button slide to move said first plunger rod andsaid presettable cam means thereon to position the first tuning elementto tune the radio to a preset broadcast station of the first frequencyband, said cam means in said second position with the radio switched tothe second frequency band acting to couple said button slide to saidsecond plunger rod, so that operation of the pushbutton slides saidbutton slide to move said second plunger rod and said presettable cammeans thereon to position the second tuning element to tune the radio toa preset broadcast station in the second frequency band, and pullingsaid pushbutton with said cam means in said first and second positionsoperates said means integral with each said plunger rod to unlock saidpresettable cam means to permit moving the same to a different position,and pushing the pushbutton operates said means integral with each saidplunger rod to lock said presettable cam means in the differentposition.
 2. The pushbutton radio of claim 1 wherein said button slideincludes engaging means connected thereto, and said first and secondplunger rods have channel means for slidably receiving said engagingmeans and passage means including a notch in each of said plunger rodsnormal to said channel therein, said notches being aligned to form apassage connecting said channels, said engaging means selectivelyextending through said notch in each of said plunger rods, said cammeans acting to position said button guide to the first position andswitching the radio to the first frequency band so that said engagingmeans is received in said channel means of said second pLunger rodwhereby operation of the pushbutton slides said button slide in saidbutton guide with said engaging means sliding in said channel means ofsaid second rod and engaging the wall of the notch in said first plungerrod to move said first rod to vary said first tuning element to tune theradio to a preset station in the first frequency band, and said cammeans acting to position said button guide to the second position andswitching the radio to the second frequency band, so that said engagingmeans moves in said passage means with said notches being aligned andbeing received in said channel means of said first plunger rod, wherebyoperation of the pushbutton slides said button slide in said buttonguide with said engaging means sliding in said channel means of saidfirst rod and engaging the wall of said notch in said second plunger rodto move the same to vary said second tuning element to tune the radio toa preset station in the second frequency band.
 3. The pushbutton radioof claim 1 wherein said button slide is formed by an extended hollowportion of the pushbutton, said button slide having an open end andcontact means connected thereto, and said first and second plunger rodsare coupled to the first and second tuning elements and extend into saidhollow portion of said button slide through said open end, each saidplunger rod having a portion being selectively connected to said contactmeans.
 4. The pushbutton radio of claim 3 wherein said contact meansincludes first and second oppositely disposed connecting members mountedto said extended hollow portion of said button slide and said portionsof said first and second plunger rods each have a notch therein, saidcam means acting to position said button guide to the first position sothat said first connecting member engages said notch in said firstplunger rod whereby pushing the pushbutton slides said button slide withsaid connecting member engaging the wall of said notch to move saidfirst plunger rod to vary the first tuning element, and said cam meanspositioning said button guide to the second position so that said secondconnecting member engages said notch in said second plunger rod wherebypushing the pushbutton slides said button slide with said connectingmember engaging the wall of said notch to move said second plunger rodto vary the second tuning element.
 5. An AM-FM pushbutton radio havingtuning means including AM and FM tuning elements and a key slidestructure carrying a presettable cam thereon for controlling theposition of the tuning elements, the radio including in combination, apushbutton, a selector switch actuable to switch the radio between FMand AM modes, cam means, a button guide, said cam means being connectedto said button guide and being operated to move the same to first andsecond positions, a button slide connected to said pushbutton andslidably mounted in said button guide and movable therewith, a connectorextending from said button slide, first and second plunger rods coupledto the FM and AM tuning elements, said first and second plunger rodseach having channel means for slidably receiving said connector andpassage means including a notch in each of said plunger rods normal tosaid channel therein and being aligned to form a passage connecting saidchannels, said connector selectively extending through said notch ineach said plunger rod, said cam means acting to position said buttonguide to the first position and said selector switch switching the radioto the FM mode, so that said connector extends through said notch insaid first plunger rod and is received in said channel means of saidsecond plunger rod whereby pushing said pushbutton slides said buttonslide in said button guide with said connector engaging the wall of saidnotch in said first plunger rod and sliding in said channel means ofsaid second plunger rod to move the first plunger rod to vary the FMtuning element, said cam means acting to position said button guide tothe seCond position and said selector switch switching the radio to theAM mode so that said connector moves in said passage means with saidnotches being aligned and is received in said channel means of saidfirst said first plunger rod, whereby pushing said pushbutton slidessaid button slide in said button guide with said connector engaging thewall of said notch in said second plunger rod and sliding in saidchannel means of said first plunger rod to move the second plunger rodto vary said AM tuning element.
 6. The AM-FM pushbutton radio of claim 5further including said first and second plunger rods each having firstand second relatively movable parts with a presettable cam clamped in afixed position therebetween, said cam means acting to position saidbutton guide to the first position so that said connector is received insaid channel means of said second plunger rod whereby pulling saidpushbutton slides said button slide in said button guide and engagessaid connector with the wall of said notch in said first plunger rod andslides said connector in said channel means of said second plunger rodto move the first plunger rod and to move said first part thereofrelative to said second part to unclamp said presettable cam, and saidcam means acting to position said button guide to the second position sothat said connector is received in said channel means of said firstplunger rod, whereby pulling said pushbutton slides said button slide insaid button guide to engage the wall of said notch in said secondplunger rod and slides said connector in said channel means in saidfirst plunger rod to move the second plunger rod to move said first partthereof relative to said second part to unclamp said presettable cam,thereby permitting the presettable cams to be locked in a plurality ofpositions for controlling the position of the AM and FM tuning elements.7. The AM-M pushbutton radio of claim 6 further including locking meansto limit the pushing movement of said pushbutton to prevent jamming ofthe tuning means with said pushbutton being pulled to unlock saidpresettable cam and said cam means being moved to position said buttonguide from the first to the second positions.
 8. The AM-FM pushbuttonradio of claim 7 wherein said locking means includes a second notch ineach of said plunger rods normal to said channel means therein andspaced from said first notch, said cam means positioning said buttonguide to the first position so that said connector is received in saidchannel means of said second plunger rod, whereby pulling saidpushbutton slides said button slide in said button guide with saidconnectors sliding in said channel means to engage the wall of saidfirst notch in said first plunger rod to move the same to unclamp saidpresettable cam and to align said first notch with said second notch insaid second plunger rod to connect the respective channel means, andsaid cam means acting to move said button guide to the second positionso that said connector moves in said aligned notches into said channelmeans of said first plunger rod, whereby pushing said pushbutton causessaid connector to slide in said channel means of said first plunger rodand to strike the wall of said channel means therein thereby limitingthe motion of said first plunger rod to prevent jamming of the tuningmeans.
 9. A pushbutton tuner for a wave signal receiver having tuningelements for receiving signal stations in first and second frequencybands, including in combination, one set of pushbuttons, a plurality ofgroups of first and second actuating devices, each group associated witha different one of said pushbuttons, mode selector means for connectinga given pushbutton with one of said first and second actuating devices,presettable means operable by each actuating device for positioning thetuning elements to preset stations in the different bands, locking meansoperable by each pushbutton through said actuating device for lockingsaid presettAble means in a predetermined position and unlocking thesame, said mode selector means connecting a given pushbutton to saidfirst actuating device so that inward movement of said pushbuttonoperates said presettable means through said first actuating device toposition the tuning elements to select a preset station, and outwardmovement of said given pushbutton operates said locking means throughsaid first actuating device to unlock said presettable means so the samecan be reset to a different station, and antijamming means, saidantijamming means acting to prevent said mode selector means fromconnecting any one of said pushbuttons to an associated one of saidgroup of second actuating devices and being moved inwardly to positionthe tuning elements, with said given pushbutton being connected to saidfirst actuating device and being moved outwardly to unlock saidpresettable means to set another station.